小编Sac*_*mar的帖子

我使用以下代码从过滤器(ActionFilterAttribute)向客户端发送错误消息.

catch (Exception)
 {
    var response = context.Request.CreateResponse(httpStatusCode.Unauthorized);
    response.Content = new StringContent("User with api key is not valid");
    context.Response = response;
 }

但问题是它只以纯文本形式发出.我想把它作为当前格式化程序的格式发送.像json或xml的形式.

在这里我知道这是因为我正在使用StringContent().但是我们如何使用自定义Error对象编写？比如,以下内容也不起作用:

response.Content = new Error({Message = "User with api key is not valid"});

我们如何为此编写代码？提前致谢.

我正在使用Rotativa工具来显示pdf.它可以正常使用以下代码:

public ActionResult PreviewDocument()
{

     var htmlContent = Session["html"].ToString();
     var model = new PdfInfo { Content = htmlContent, Name = "PDF Doc" };
     return new ViewAsPdf(model);
}

我想知道通过浏览器的"另存为"对话框下载pdf的方式,点击按钮而不是显示在某个iframe中."new ViewAsPdf(model)"只返回pdf数据.

提前致谢.

我的ApiKey验证示例代码如下(我使用的是MVC4 web api RC):

public class ApiKeyFilter : ActionFilterAttribute
{
    public override void OnActionExecuting(HttpActionContext context)
    {
        //read api key from query string
        string querystring = context.Request.RequestUri.Query;
        string apikey = HttpUtility.ParseQueryString(querystring).Get("apikey");

        //if no api key supplied, send out validation message
        if (string.IsNullOrWhiteSpace(apikey))
        {                
            var response = context.Request.CreateResponse(HttpStatusCode.Unauthorized, new Error { Message = "You can't use the API without the key." });
            throw new HttpResponseException(response);
        }
        else
        {          
             try
            {
                GetUser(decodedString); //error occurred here
            }
            catch (Exception)
            {
                var response = context.Request.CreateResponse(HttpStatusCode.Unauthorized, …

下面是我的MVC Web Api RC的Get方法.

public Employee Get(int id)
{
     Employee emp= null;

     //try getting the Employee with given id, if not found, gracefully return error message with notfound status
     if (!_repository.TryGet(id, out emp))
         throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.NotFound)
         {
             Content = new StringContent("Sorry! no Employee found with id " + id),
             ReasonPhrase = "Error"
         });

      return emp;
}

这里的问题是,无论何时抛出错误"抱歉!没有找到带有id的员工",只是采用平面文本格式.但是我想根据我当前的格式化程序设置格式.就像默认情况下我在global.asax中设置了XML格式化程序.因此错误应以XML格式显示.就像是 :

<error>
  <error>Sorry! no Employee found with id </error>
</error>

同样适用于Json格式化程序.它应该是 :

[{"errror","Sorry! no Employee found with id"}]

提前致谢